Audio mixer



FIG. 1 is a top, front and right side perspective view of an audio mixershowing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view therof; and,

FIG. 7 is a bottom plan view thereof.

The ornamental design for a audio mixer, as shown.